CN115220174B - Integrated opening flexible supporting structure for supporting reflector - Google Patents
Integrated opening flexible supporting structure for supporting reflector Download PDFInfo
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- CN115220174B CN115220174B CN202210990508.5A CN202210990508A CN115220174B CN 115220174 B CN115220174 B CN 115220174B CN 202210990508 A CN202210990508 A CN 202210990508A CN 115220174 B CN115220174 B CN 115220174B
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- Prior art keywords
- flexible
- support
- supporting
- reflector
- mirror
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
- G02B7/183—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors specially adapted for very large mirrors, e.g. for astronomy, or solar concentrators
Abstract
The application aims to solve the technical problem of the prior art related to flexible assembly of a reflector, and provides an integrated opening flexible supporting structure for supporting the reflector. The support reinforcing rib structure is positioned at the rear part of the support flange plate and is used for providing support force for the flexible support structure; the inner structure of the flexible supporting structure body is a supporting reinforcing rib structure and connecting ribs, and is connected with the supporting flange plate; the flexible supporting structure is adhered with the reflector by smearing optical structural adhesive on the connecting surface of the flexible supporting structure body in a matching way; the connecting surface of the flexible supporting structure body is provided with an unloading groove structure, and the unloading groove structure is used for providing required flexibility for the reflecting mirror so as to reduce the surface shape precision change of the reflecting mirror caused by factors such as vibration, temperature and the like, so that after the reflecting mirror is irradiated by light, the light is reflected according to an expected light path, and the imaging quality of the optical camera is ensured. Meanwhile, the structure of the application adopts an integrated structure, thereby reducing the assembly difficulty of the reflector and the imaging deviation generated in the using process.
Description
Technical Field
The application relates to the technical field of aerospace precise instruments, in particular to an integrated opening flexible supporting structure for supporting a reflecting mirror.
Background
In the prior art, a large-caliber reflector, in particular to a reflector with the diameter exceeding 400mm, and the supporting structure of the reflector is mainly a three-point supporting mode; the supporting structure is a flexible supporting structure, the flexibility of the supporting structure can offset the stress of the surface shape change of the reflecting mirror caused by the factors such as vibration, temperature change and the like, and meanwhile, the surface shape precision of the reflecting mirror is ensured, and the influence of the deformation of the mirror surface of the reflecting mirror on the imaging of the optical machine is reduced;
wherein, bearing structure mostly is assembly subassembly, in order to solve assembly subassembly and the problem that exists in the use of installation, need design an integral type flexible supporting structure for replace the support assembly subassembly.
At present, most of large-caliber reflector supporting structures are assembly component type supporting structures, and are connected through bolts in a split assembly mode of taper sleeves and flexible supports. In the assembly process, if machining errors are overlarge or other reasons cause deviation of the matching hole positions, two parts are difficult to install or cannot be installed; 2. meanwhile, incorrect installation can also cause stress concentration phenomenon of the flexible supporting structure in the use process, so that parts are damaged; 3. the two assembly parts adopt different materials, and the thermal characteristics of the different materials are different, so that the parts can be expanded and deformed differently under the heated condition, and the parts are subjected to uneven thermal stress, so that the parts deform or fail. In order to solve the problems of the assembly component in the installation and use process, a taper sleeve and flexible support integrated flexible support structure is required to be designed for replacing the support assembly component.
For example, in the prior art, the technical solution proposed by the technical solution of the document name "design of back support structure of reflector of remote sensor in space" by author Wang Kejun is shown in fig. 1, 2 and 3, and mainly comprises two parts, namely a taper sleeve and a flexible support structure, which are fixed by bolting, wherein the taper sleeve is made of indium steel, and the flexible support structure is made of titanium alloy.
Disclosure of Invention
The application aims to solve the technical problem of the prior art related to flexible assembly of a reflector, and provides an integrated opening flexible supporting structure for supporting the reflector. The technical explanation for flexible assembly is: in the using process of the reflector, the flexible structure belongs to a key factor, the flexible structure is used as a dynamic support, and the surface shape precision RMS reaches the precision requirement (lambda=632.8 nm) less than or equal to lambda/50 under the conditions of vibration, temperature change and the like of the reflector through the elastic deformation of the flexible structure; by analyzing the change of the surface shape precision of the reflecting mirror, whether the flexible structure meets the current use requirement can be analyzed.
In order to solve the technical problems, the technical scheme of the application is as follows:
the core content of the application mainly comprises the following two points: 1. the structure of the application is integrated, so that the installation and use problems caused by a split assembly type structure can be avoided; 2. at present, most of three-point type flexible supporting structures are closed structures, the flexible structure is an opening flexible supporting structure, the opening structure can provide required flexibility for the supporting structure, meanwhile, in the processing process, the processing difficulty is reduced, the production is convenient, the whole quality of the supporting structure is relatively light, and the three-point type flexible supporting structure is characterized in that:
an integrated open flexible support structure for mirror support, comprising:
the support flange plate is connected with the backboard through the threaded holes and the through holes by using bolts and pins;
the support reinforcing rib structure is connected with the support flange plate and is used for providing supporting force for the flexible support structure body;
the flexible support structure body, inner structure is for supporting strengthening rib structure and inner tube structure, with support ring flange links to each other.
The flexible supporting structure body is matched with the reflector by using a connecting surface, and the flexible supporting and matching mode is that the connecting surface of the flexible supporting structure body is adhered with the reflector by smearing optical structural adhesive;
the connecting surface of the flexible supporting structure body is provided with an unloading groove structure, and the unloading groove structure is used for providing required flexibility for the reflecting mirror so as to reduce the surface shape precision change of the reflecting mirror after being disturbed.
Specifically, the flexible support structure body is made of indium steel.
Specifically, the diameter of the flexible supporting structure body gradually increases from the reflector to the direction of the backboard, and the flexible supporting structure body is in a truncated cone shape.
Specifically, the flexible support structure body further comprises an outer cylinder structure;
the outer cylinder structure is in a round table shape;
the inner cylinder structure is hollow cylindrical;
the outer barrel structure and the inner barrel structure have the same center.
Specifically, the outer cylinder structure is connected with the inner cylinder structure through connecting ribs, and a plurality of first flexible spaces are formed among the outer cylinder structure, the inner cylinder structure and the connecting ribs.
Specifically, the unloading groove structure is arranged on the inner cylinder structure;
the unloading groove structure comprises a plurality of unloading groove structures which are arranged along the height direction of the inner cylinder structure from the first end of the inner cylinder structure;
wherein, the uninstallation groove structure with the connecting rib staggered arrangement.
Preferably, the unloading groove structure comprises a plurality of unloading groove structures and is formed along the height direction of the outer cylinder structure from the first end of the outer cylinder structure.
Preferably, the unloading slot structure comprises:
a longitudinal slot formed from a first end of the outer barrel structure;
a transverse slot communicating with the longitudinal slot;
wherein the width of the transverse slot is greater than the width of the longitudinal slot;
both ends of the transverse groove are formed into a guide arc.
Preferably, the support flange plate includes: the center supports the section of thick bamboo, flange mounting dish ring.
Preferably, the support reinforcing rib structure includes:
and one end of the supporting body is connected with the second end of the inner cylinder structure, and the other end of the supporting body is connected with the central supporting cylinder.
The application has the following beneficial effects:
the technical scheme of the application has the advantages of small mass, enough supporting strength, ensuring that the reflecting mirror obtains due rigidity, meeting the flexibility required by the reflecting mirror, and being superior to the structure in the prior art in structural surface shape accuracy under the condition of thermal expansion deformation.
In addition, the structure of the application can replace the existing conventional structure and be used as a reflector supporting structure, and further, under the conditions of gravity and thermal expansion, the surface shape precision is improved, the accuracy and the effectiveness of collecting light rays by the reflector are ensured, and meanwhile, imaging deviation caused by poor surface shape precision can be avoided, and the imaging quality of an optical machine and the accuracy of a light machine transfer function are ensured.
Drawings
The application is described in further detail below with reference to the drawings and the detailed description.
FIG. 1 is a schematic illustration of a prior art flexible structure;
FIG. 2 is an assembled embodiment of a prior art flexible structure;
FIG. 3 is another assembled embodiment of a prior art flexible structure;
FIG. 4 is an assembled embodiment of the present application;
FIG. 5 is a schematic representation of an embodiment of the present application based on simulated selection of structural parameters;
FIG. 6 is a schematic representation of another embodiment of the present application based on simulated selection of structural parameters;
FIG. 7 is a schematic diagram of the structure of the present application;
FIG. 8 is a schematic view of the structure of the flexible support base of the present application;
FIG. 9 is a schematic view of the structure of the unloading slot of the present application;
fig. 10 is a schematic three-dimensional structure of the present application.
Reference numerals in the drawings denote:
the support flange plate 10, the back plate 2, the support reinforcing rib structure 20, the flexible support structure body 30, the reflector 2 and the unloading groove structure 40;
the inner cylinder structure 31, the outer cylinder structure 32, the connecting ribs 33 and the first flexible space 101;
longitudinal grooves 41, transverse grooves 42, base body 11, and center support cylinder 13.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, based on the embodiments of the application, which a person of ordinary skill in the art would obtain without inventive faculty, are within the scope of the application; it should be noted that, for convenience of description, in the present application, a "left side" is a "first end", a "right side" is a "second end", an "upper side" is a "first end", and a "lower side" is a "second end" in the present view, and the description is for clearly expressing the technical solution, and should not be construed as unduly limiting the technical solution of the present application.
Referring to fig. 3-10, the supporting flange plate 10 of the present application uses a disc structure as a mounting base, the flexible supporting structure body 30 is provided with unloading groove structures 40, the unloading groove structures 40 are uniformly distributed at 120 degrees, and the whole structure of the technical scheme is axisymmetric; specifically:
in one particular embodiment, referring to fig. 7-10, an integrated open flexible support structure for mirror support, comprising:
a support flange 10 for connecting the back plate 2;
a support rib structure 20 connected to the support flange 10 and for providing a supporting force to the flexible support structure body 30;
the flexible supporting structure body 30 has an internal structure comprising the supporting reinforcing rib structure 20 and the internal cylinder structure 31, and is connected with the supporting flange plate 10;
the flexible supporting structure body 30 is matched with the reflector 1 by using a connecting surface, and the flexible supporting and matching mode is that the connecting surface of the flexible supporting structure body 30 is adhered with the reflector by smearing optical structural adhesive;
the connection surface of the flexible supporting structure body 30 is provided with an unloading groove structure 40, and the unloading groove structure 40 is used for providing the required flexibility for the reflector 1 so as to reduce the surface shape precision change between the unloading groove structure and the reflector 1.
In one particular embodiment, referring to fig. 7-10, the flexible support structure body 30 is made of indium steel.
In a specific embodiment, referring to fig. 7-10, the flexible support structure body 30 is configured in a truncated cone shape with a diameter gradually increasing from the reflector 1 toward the back plate 2.
In one particular embodiment, referring to FIGS. 7-10, the flexible support structure body 30 further includes an outer barrel structure 32;
the outer cylinder structure 32 is in a shape of a circular truncated cone;
the inner cylinder structure 31 is hollow cylindrical;
the outer barrel structure 32 and the inner barrel structure have the same center.
In a specific embodiment, referring to fig. 7-10, the outer barrel structure 32 and the inner barrel structure 31 are connected by a connecting rib 33, and a plurality of first flexible spaces 101 are formed between the outer barrel structure 32, the inner barrel structure 31 and the connecting rib 33.
In one embodiment, referring to FIGS. 7-10, an unloading slot structure 40 is provided in the inner barrel structure 31;
the unloading slot structure 40 comprises a plurality of unloading slot structures and is opened along the height direction of the inner cylinder structure 31 from the first end of the inner cylinder structure 31;
wherein the unloading slot structures 40 are staggered with the connecting ribs 33.
In one particular embodiment, referring to fig. 7-10, the relief slot structure 40 includes a plurality of relief slots and opens from the first end of the outer barrel structure 32 along the height of the outer barrel structure 32.
In one particular embodiment, referring to FIGS. 7-10, the unloading slot structure 40 includes:
a longitudinal slot 41 formed from a first end of the outer barrel structure 32;
a lateral groove 42 communicating with the longitudinal groove 41;
wherein the width of the transverse grooves 42 is greater than the width of the longitudinal grooves 41;
both ends of the transverse groove 42 are configured as a guide arc.
In one embodiment, referring to fig. 7-10, the support flange 10 comprises:
a central support cylinder 13 connected to the flange-mounted disc ring 11.
Referring to fig. 10, the supporting reinforcement structure 20 includes:
the support 22 has one end connected to the second end of the inner cylinder structure 31 and the other end connected to the central support cylinder 13.
The technical scheme in the embodiment is compared with the prior art;
structural performance contrast: as shown in figure 1, the comparison object is a conventional flexible supporting structure of a current large-caliber reflector (reference document: "space remote sensor reflector back supporting structure design_ Wang Kejun"). The structure is divided into two parts, namely a taper sleeve and a flexible supporting structure, wherein the taper sleeve and the flexible supporting structure are fixedly connected through bolts, the taper sleeve is made of indium steel, and the flexible supporting structure is made of titanium alloy. The performance comparison of the application and the existing flexible support structure is carried out by only changing the flexible support structure by comparing the reflector with the same diameter and the backboard with the same structure.
Referring to fig. 3 and 4, a binding pair such as shown in table 1:
respectively carrying out statics simulation analysis on the reflecting mirror components in the figures 3 and 4 to obtain the following results;
table 1 first comparative results
From the results of modal, gravity and temperature simulation of the mirror assembly, it can be seen that the first modes of the two differ less; under the gravity condition, the shape accuracy change is basically the same; as the structure of the application is an integrated structure, and the indium steel material with smaller linear expansion coefficient is used, the comparison shows that the structure of the application is superior to the structure of the prior art in terms of thermal expansion deformation, and simultaneously, the quality of the integrated structure of the application is optimized.
Summarizing: the structure of the application has small mass compared with the prior structure, can provide enough supporting strength, ensures the due rigidity of the reflecting mirror, and simultaneously satisfies the flexibility required by the reflecting mirror.
The mounting position of the mirror assembly was a back plate, so that the mirror assembly was mounted on the back plate, and simulation was performed again, to obtain the following results.
Table 2 second comparative results
As can be seen from simulation results, when the reflector assembly is mounted on the backboard, under the condition of being subjected to gravity, the surface shape precision difference between the application structure and the reference structure is large, after the application structure is adopted as the reflector supporting structure, the surface shape precision in the X direction and the Y direction after the action of gravity is respectively improved by 37% and 31%, and after thermal expansion deformation, the surface shape precision is improved by 85%.
Summarizing: from the above results, the inventive structure can replace the conventional structure as a mirror support structure, while the surface shape accuracy is improved under the conditions of gravity and thermal expansion.
In order to study whether the structure of the application has universal applicability, the application structure is adopted as a reflector supporting structure by taking reflectors with different sizes as study objects, and the combined reflector assembly is simulated to obtain the following result, namely a third comparison result.
Table 3 third comparative results
As can be seen from simulation results, the structure of the application still meets the use requirements as a supporting structure for reflectors with different diameters.
The surface shape accuracy requirements may be different for different use conditions, so in this case, a corresponding modification of the structural dimensions is required to meet the use requirements.
As shown in fig. 5 and 6, under the action of gravity alone, the key positions of the influencing structure are the supporting reinforcing rib structure 20 and the unloading slot structure 40, so that the dimensions of the two positions are changed to obtain the relevant change rule.
First distance of spacing H
First width distance L1
Second width distance L2
First height h1
Second height h2
Diameter phi of circular arc
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the application.
Claims (10)
1. An integrated open flexible support structure for mirror support, comprising:
a support flange (10) connected with the back plate (2) by bolts and pins;
a support stiffener structure (20) connected to the support flange (10) and adapted to provide a supporting force for the flexible support structure body (30);
the flexible support structure body (30) has an internal structure that the support reinforcing rib structure (20) and the inner cylinder structure (31) are connected with the support flange (10);
the flexible supporting structure body (30) is matched with the reflector (1) by using a connecting surface, and the flexible supporting and matching mode is that the connecting surface of the flexible supporting structure body (30) is adhered with the reflector by smearing optical structural adhesive;
the connecting surface of the flexible supporting structure body (30) is provided with an unloading groove structure (40), and the unloading groove structure (40) is used for providing required flexibility for the reflecting mirror (1) so as to reduce the variation of the shape precision of the reflecting mirror surface.
2. An integrated open flexible support structure for mirror support according to claim 1, characterized in that the flexible support structure body (30) is made of indium steel.
3. An integrated open flexible support structure for mirror support according to claim 2, characterized in that the flexible support structure body (30) increases in diameter gradually from the mirror (1) toward the back plate (2) and is configured in a truncated cone shape.
4. A unitary open-ended flexible support structure for mirror support as claimed in claim 3, wherein said flexible support structure body (30) further comprises an outer barrel structure (32);
the outer cylinder structure (32) is in a round table shape;
the inner cylinder structure (31) is in a hollow cylinder shape;
the outer barrel structure (32) and the inner barrel structure (31) have the same center.
5. An integrated open flexible support structure for mirror support according to claim 4, characterized in that the outer cylinder structure (32) and the inner cylinder structure (31) are connected by means of a connecting rib (33), and that a plurality of first flexible spaces (101) are formed between the outer cylinder structure (32), the inner cylinder structure (31) and the connecting rib (33).
6. An integrated open flexible support structure for mirror support according to claim 5, characterized in that said unloading slot structure (40) is open on said inner cylinder structure (31);
the unloading groove structure (40) comprises a plurality of unloading groove structures and is formed along the height direction of the inner cylinder structure (31) from the first end of the inner cylinder structure (31);
wherein the unloading groove structures (40) and the connecting ribs (33) are arranged in a staggered manner.
7. The integrated open flexible support structure for mirror support according to claim 5, wherein the unloading slot structure (40) comprises a plurality and is open from the first end of the outer cylinder structure (32) along the height direction of the outer cylinder structure (32).
8. An integrated open flexible support structure for mirror support according to claim 7, wherein said relief slot structure (40) comprises:
a longitudinal slot (41) formed from a first end of the outer barrel structure (32);
-a transversal groove (42) communicating with the longitudinal groove (41);
wherein the width of the transverse grooves (42) is greater than the width of the longitudinal grooves (41);
both ends of the transverse groove (42) are formed into a circular guide arc.
9. An integrated open flexible support structure for mirror support according to any of claims 4-8, characterized in that the support flange (10) comprises: and the central support cylinder (13) is connected with the flange mounting disc circular ring (11).
10. An integrated open flexible support structure for mirror support according to claim 9, wherein the support stiffener structure (20) comprises:
and one end of the supporting body is connected with the second end of the inner cylinder structure (31), and the other end of the supporting body is connected with the central supporting cylinder (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210990508.5A CN115220174B (en) | 2022-08-18 | 2022-08-18 | Integrated opening flexible supporting structure for supporting reflector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210990508.5A CN115220174B (en) | 2022-08-18 | 2022-08-18 | Integrated opening flexible supporting structure for supporting reflector |
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| Publication Number | Publication Date |
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| CN115220174A CN115220174A (en) | 2022-10-21 |
| CN115220174B true CN115220174B (en) | 2023-09-26 |
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| CN202210990508.5A Active CN115220174B (en) | 2022-08-18 | 2022-08-18 | Integrated opening flexible supporting structure for supporting reflector |
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| US20020015243A1 (en) * | 2000-07-14 | 2002-02-07 | Glovatsky Andrew Zachary | Flexible mirror assembly |
| WO2004057406A2 (en) * | 2002-12-23 | 2004-07-08 | Bae Systems Plc | Deformable-mirror cooling |
| US7708415B2 (en) * | 2003-10-20 | 2010-05-04 | Bae Systems Plc | Mirror structure having piezoelectric element bonded to a mirror substrate |
| US9268069B2 (en) * | 2010-01-29 | 2016-02-23 | Thomas Boeman | Parabolic reflector |
| US9958638B2 (en) * | 2013-09-13 | 2018-05-01 | Raytheon Company | Optimal kinematic mount for large mirrors |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005152972A (en) * | 2003-11-27 | 2005-06-16 | Mitsubishi Electric Corp | Laser beam machining apparatus |
| US8979329B1 (en) * | 2011-04-18 | 2015-03-17 | Cooper Technologies Company | Method and apparatus for a curved wall reflector assembly |
| CN106291867A (en) * | 2016-09-29 | 2017-01-04 | 中国科学院西安光学精密机械研究所 | A kind of support integration reflecting mirror |
| CN106371191A (en) * | 2016-11-28 | 2017-02-01 | 长光卫星技术有限公司 | Flexible support structure of light optical reflector |
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